CVE-2025-4878

LOWPre-NVD 3.63.6—
EchelonGraph scoreMEDIUM confidence

Score 3.6 from GitHub Security Advisory (severity: LOW) published 2025-07-22. a secondary CVSS source baseline 3.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
3.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 3.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption.

CVSS v3
3.6
EG Score
3.6LOWmedium confidence
EG Risk
16
EG Risk 16/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity36% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

Published

July 22, 2025

Last Modified

September 1, 2026

References (6)

Vendor Advisories for CVE-2025-4878(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibssh-gcrypt-dev (0.9.3-2ubuntu2.5+esm1) @ focal2026-09-01ubuntu
ubuntulibssh-gcrypt-dev (0.9.6-2ubuntu0.22.04.4) @ jammy2026-09-01ubuntu
redhatlibssh-0:0.10.4-18.el92026-05-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libssh0.9.5-1 ... 0.9.8-0+deb11u1 (6 versions)
  • every version up to 0.9.8-0+deb11u2: fixed in 0.9.8-0+deb11u2
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libssh0.10.5-2, 0.10.5-3, 0.10.5-3+hurd.1, 0.10.6-0+deb12u1
  • every version up to 0.10.6-0+deb12u2: fixed in 0.10.6-0+deb12u2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libssh—
  • every version up to 0.11.2-1: fixed in 0.11.2-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libssh—
  • every version up to 0.11.2-1: fixed in 0.11.2-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 222 total refreshes for this CVE.

  1. 2026-10-10 02:55 UTCOSV refresh
  2. 2026-10-09 20:06 UTCEPSS rescore
  3. 2026-10-08 17:10 UTCEPSS rescore
  4. 2026-10-07 23:47 UTCEPSS rescore
  5. 2026-10-06 15:17 UTCEPSS rescore
  6. 2026-10-05 17:42 UTCEPSS rescore
  7. 2026-10-04 23:21 UTCEPSS rescore
  8. 2026-10-03 14:24 UTCEPSS rescore
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-09-30 15:02 UTCEPSS rescore
  11. 2026-09-30 15:02 UTCEPSS rescore
  12. 2026-09-28 13:50 UTCEPSS rescore
  13. 2026-09-27 13:45 UTCEPSS rescore
  14. 2026-09-26 15:58 UTCEPSS rescore
  15. 2026-09-26 00:25 UTCEPSS rescore
  16. 2026-09-24 14:02 UTCEPSS rescore
  17. 2026-09-24 14:02 UTCEPSS rescore
  18. 2026-09-23 13:47 UTCEPSS rescore
  19. 2026-09-21 21:06 UTCEPSS rescore
  20. 2026-09-20 20:15 UTCEPSS rescore
  21. 2026-09-20 20:15 UTCEPSS rescore
  22. 2026-09-20 11:51 UTCOSV refresh
  23. 2026-09-18 19:27 UTCEPSS rescore
  24. 2026-09-18 19:27 UTCEPSS rescore
  25. 2026-09-17 19:29 UTCEPSS rescore
Show 75 more
  1. 2026-09-16 14:07 UTCEPSS rescore
  2. 2026-09-15 03:09 UTCEPSS rescore
  3. 2026-09-12 15:00 UTCEPSS rescore
  4. 2026-09-11 14:52 UTCEPSS rescore
  5. 2026-09-11 09:36 UTCEPSS rescore
  6. 2026-09-10 09:34 UTCEPSS rescore
  7. 2026-09-08 21:59 UTCEPSS rescore
  8. 2026-09-07 16:00 UTCEPSS rescore
  9. 2026-09-07 16:00 UTCEPSS rescore
  10. 2026-09-06 13:46 UTCEPSS rescore
  11. 2026-09-05 15:28 UTCEPSS rescore
  12. 2026-09-04 05:06 UTCEPSS rescore
  13. 2026-09-02 14:11 UTCEPSS rescore
  14. 2026-09-01 13:53 UTCEG score recompute
  15. 2026-09-01 13:53 UTCVendor advisory
  16. 2026-09-01 13:53 UTCGHSA enrichment
  17. 2026-09-01 13:53 UTCEPSS rescore
  18. 2026-09-01 12:25 UTCEG score recompute
  19. 2026-09-01 12:25 UTCVendor advisory
  20. 2026-09-01 12:25 UTCGHSA enrichment
  21. 2026-09-01 04:38 UTCEPSS rescore
  22. 2026-08-31 16:43 UTCEG score recompute
  23. 2026-08-31 16:43 UTCVendor advisory
  24. 2026-08-31 16:43 UTCGHSA enrichment
  25. 2026-08-30 19:16 UTCEPSS rescore
  26. 2026-08-30 01:21 UTCEPSS rescore
  27. 2026-08-28 21:40 UTCEPSS rescore
  28. 2026-08-27 14:24 UTCEPSS rescore
  29. 2026-08-26 14:45 UTCEPSS rescore
  30. 2026-08-25 13:48 UTCEPSS rescore
  31. 2026-08-24 14:16 UTCEPSS rescore
  32. 2026-08-24 09:22 UTCEPSS rescore
  33. 2026-08-23 00:18 UTCEPSS rescore
  34. 2026-08-21 23:48 UTCEPSS rescore
  35. 2026-08-21 13:24 UTCEG score recompute
  36. 2026-08-21 13:24 UTCVendor advisory
  37. 2026-08-21 13:24 UTCGHSA enrichment
  38. 2026-08-21 13:10 UTCEG score recompute
  39. 2026-08-21 13:10 UTCVendor advisory
  40. 2026-08-21 13:10 UTCGHSA enrichment
  41. 2026-08-20 22:54 UTCEPSS rescore
  42. 2026-08-19 17:03 UTCEPSS rescore
  43. 2026-08-18 13:47 UTCEPSS rescore
  44. 2026-08-17 13:46 UTCEPSS rescore
  45. 2026-08-16 14:55 UTCEPSS rescore
  46. 2026-08-16 02:13 UTCEPSS rescore
  47. 2026-08-15 01:29 UTCEPSS rescore
  48. 2026-08-13 21:59 UTCEPSS rescore
  49. 2026-08-12 13:50 UTCEPSS rescore
  50. 2026-08-12 09:24 UTCOSV refresh
  51. 2026-08-11 13:41 UTCEPSS rescore
  52. 2026-08-10 23:59 UTCEPSS rescore
  53. 2026-08-09 13:46 UTCEPSS rescore
  54. 2026-08-08 16:36 UTCEPSS rescore
  55. 2026-08-06 13:46 UTCEPSS rescore
  56. 2026-08-05 19:16 UTCEPSS rescore
  57. 2026-08-04 15:09 UTCEPSS rescore
  58. 2026-08-04 10:37 UTCEPSS rescore
  59. 2026-08-03 10:35 UTCEPSS rescore
  60. 2026-08-02 02:26 UTCEPSS rescore
  61. 2026-07-30 16:27 UTCEPSS rescore
  62. 2026-07-30 01:30 UTCEPSS rescore
  63. 2026-07-30 01:30 UTCEPSS rescore
  64. 2026-07-28 15:35 UTCEPSS rescore
  65. 2026-07-27 16:27 UTCOSV refresh
  66. 2026-07-26 14:54 UTCEPSS rescore
  67. 2026-07-25 14:17 UTCEPSS rescore
  68. 2026-07-25 14:17 UTCEPSS rescore
  69. 2026-07-24 14:17 UTCEPSS rescore
  70. 2026-07-23 14:18 UTCEPSS rescore
  71. 2026-07-23 02:57 UTCEG score recompute
  72. 2026-07-22 14:07 UTCEPSS rescore
  73. 2026-07-22 14:07 UTCEPSS rescore
  74. 2026-07-21 15:24 UTCEPSS rescore
  75. 2026-07-20 17:07 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-4878?
CVE-2025-4878 is a low vulnerability published on July 22, 2025. A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekeyfromfile() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption.
When was CVE-2025-4878 disclosed?
CVE-2025-4878 was first published on July 22, 2025, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-4878 actively exploited?
CVE-2025-4878 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-4878?
CVE-2025-4878 has a CVSS base score of 3.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-4878?
A fix for CVE-2025-4878 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-4878 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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